Service manual
Schematic Diagrams
B - 26 EC-IT8502E
B.Schematic Diagrams
EC-IT8502E
BAT_VOLT
KBC_AC/BATL#
CPU_THERM2
CPU_THERM
R147 10K_04
KBC_AC/BATL#
C693
0.1u_16V_Y 5V_04
3G_DET#
D03B
GND
D05 CO-LAY
D05
EC_VCC
SENSOR_INT#
PCLK_KBC
BT_EN
LED_SCROLL#
LED_BAT_CHG#
VDD3
5VS
SATA_LED#
GND
J_LED1
87151-2607G
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
LED_NUM#
3.3VS
LED_BAT_FULL#
5VS
5VS
SENSOR_I NT#
LED_PWR#
3.3VS
VDD3
LED_ACIN#
LED_CAP#
WLAN_EN
KBC_SPI_*_R = 0.1"~0.5"
VCORE_ON 39
KBC_MUTE#33
RX
R217 10K_04
GA2016
0_04 FOR IT8512CX/EX (W87)
0.1U_04 FOR ITE8512-J(ITE8502-J W/0 CIR) (W86)
EC Cost Down
R205 0_04
C646 *0.1u_16V_Y 5V_04
BRIGHTNESS21
LCD_BRIGHTNESS
80CLK
80DET#
3IN1
C641
*10P_50V_04
VDD3
3.3VS
BUF_PLT_RST#3,12,15,26,27,29
SMD_BAT40
LPC_AD111,28
2.4V
LED_BAT_FULL#30
LED_ACIN#30
LED_PWR#30
LED_BAT_CHG#30
R119 47_04
SCI# 16
KBC_AC/BATL#
R136 47_04
3.3V
SUSC# 13,37
D21
BAV99
A
C
AC
26.7K
PCLK_KBC15
LAN_PCIE_WAKE#29
3G_DET#27
D22
BAV99
A
C
AC
V1.0
LOW ACTIVE
C210
0.1u_16V_Y5V_04
VER.
R182
100K_04
X
3.3VS 3,9,10,11,12,13,15,16,17,18,20,21,22,23,24,26,27,28,29,30,31,32,33,34, 39
R158 1K_04
R193 10K_04
LAN_DSM#29
D03A NET
GLAN_ON
change to
LAN_DSM#
KB-SO8
KB-SO1
KB-SI0
KB-SO4
KB-SO15
5VS 18,20,22,23,24,28,30,31,32,33,34,39
KB-SO7
KB-SO10
KB-SO6
KB-SO14
KB-SO0
KB-SI3
KB-SI6
VOLTAGE
KB-SI7
KB-SI1
KB-SO11
KB-SI2
KB-SI5
C176
10u_10V_Y5V_08
.
L24
HCB1005KF-121T20
KB-SO5
KB-SO12
KB-SO9
KB-SO13
KB-SI4
KB-SO2
KB-SO3
D26
BAV99
A
C
AC
VDD3
MODEL_ID
LPC_AD211,28
THERM_ALERT#2
C225 1u_10V_06
BAT_DET40
TP_D ATA28
LID_SW#21,28
PWR_SW#34
R126 15_1%_04
SERIRQ11,28
C190
0.1u_16V_Y 5V_04
KBC_RST# 16
R192 *26.7K_04
C195
0.1u_16V_Y 5V_04
R149 15_1%_04
BAT_DET
SMC_BAT
SMD_BAT
3.3V 2,3,11, 12,13,15,16,18,21,24,26,27, 28,29,34,36,37,38,41
SMC_VGA_THERM24
X4 ZM200S_32.768KHZ
14
3 2
R199 10K_04
K/B MATRIX
FLASH
LPC
SMBUS
PS/2
PWM
UART
DAC
CLOCK
IT8512E
CIR
ADC
WAKE UP
PWM/COUNTER
LPC/WAKE UP
EXT GPIO
GP INTERRUPT
WAKE UP
GPIO
U16
IT8502E-J
WRST#
14
LPCCLK
13
LAD0
10
LAD1
9
LAD2
8
LAD3
7
LFRAME#
6
( PD )LPCPD#/WUI6/GPE6
17
SERIRQ
5
ECSMI#/GPD4( PU )
15
ECSCI#/GPD3( PU )
23
GA20/GPB5
126
KBRST#/GPB6( PU )
4
KSI0/STB#
58
KSI1/AFD#
59
KSI2/INIT#
60
KSI3/SLIN#
61
KSI4
62
KSI5
63
KSI6
64
KSI7
65
KSO0/PD0
36
KSO1/PD1
37
KSO2/PD2
38
KSO3/PD3
39
KSO4/PD4
40
KSO5/PD5
41
KSO6/PD6
42
KSO7/PD7
43
KSO8/ACK#
44
KSO9/ BUSY
45
KSO10/PE
46
KSO11/ERR#
51
KSO12/SLCT
52
KSO13
53
KSO14
54
KSO15
55
VCC
11
VSTBY
26
VSTBY
50
VSTBY
92
VSTBY
114
VSTBY
127
VSTBY
121
VBAT
3
AVCC
74
PS2CLK0/GPF0( PU )
85
PS2DAT0/GPF1( PU )
86
PS2CLK1/GPF2( PU )
87
( PD )TMRI0/WUI2/GPC4
120
( PD )TMRI1/WUI3/GPC6
124
LPCRST#/WUI4/GPD2( PU )
22
( PD )WUI5/GPE5
35
PWRSW/GPE4( PU )
125
RI1#/WUI0/GPD0( PU )
18
RI2#/WUI1/GPD1( PU )
21
( PD )RING#/PWRFAIL#/LPCRST#/GPB7
112
TXD/GPB1( PU )
109
RXD/GPB0( PU )
108
( PD )CTX/GPB2
123
PS2DAT1/GPF3( PU )
88
PS2CLK2/GPF4( PU )
89
PS2DAT2/GPF5( PU )
90
( PD )TACH0/GPD6
47
( PD )TACH1/GPD7
48
PWM0/GPA0( PU )
24
PWM1/GPA1( PU )
25
PWM2/GPA2( PU )
28
PWM3/GPA3( PU )
29
PWM4/GPA4( PU )
30
PWM5/GPA5( PU )
31
PWM6/GPA6( PU )
32
PWM7/GPA7( PU )
34
ADC0/GPI0
66
ADC1/GPI1
67
ADC2/GPI2
68
ADC3/GPI3
69
ADC4/GPI4
70
ADC5/GPI5
71
ADC6/GPI6
72
ADC7/GPI7
73
VSS
1
VSS
12
VSS
27
VSS
49
VSS
122
VSS
113
AVSS
75
CK32KE
2
CK32K
128
DAC3/GPJ3
79
DAC2/GPJ2
78
DAC1/GPJ1
77
DAC0/GPJ0
76
( PD )EGCS#/GPE2
83
( PD )EGCLK/GPE3
84
( PD )EGAD/GPE1
82
GINT/GPD5( PU )
33
L80LLAT/GPE7( PU )
20
VSS
91
DAC5/GPJ5
81
DAC4/GPJ4
80
PWUREQ#/GPC7( PU )
16
( PD )CRX/GPC0
119
( PD )KSO16/GPC3
56
( PD )KSO17/GPC5
57
( PD )I D0/GPH0
93
( PD )I D1/GPH1
94
( PD )I D2/GPH2
95
( PD )I D3/GPH3
96
( PD )I D4/GPH4
97
( PD )I D5/GPH5
98
( PD )I D6/GPH6
99
( PD )I D7/GPG1
107
SMCLK0/GPB3
110
SMDAT0/GPB4
111
SMCLK1/GPC1
115
SMDAT1/GPC2
116
SMCLK2/GPF6( PU )
117
SMDAT2/GPF7( PU )
118
FLFRAME#/GPG2
100
FLAD0/SCE#
101
FLAD1/SI
102
FLAD2/SO
103
FLAD3/GPG6
104
FLCLK/SCK
105
( PD )FLRST#/WUI7/TM/GPG0
106
( PD )L80HLAT/GPE0
19
C184
15p_50V_NPO_04
U13
EN25P05-50GCP
CE#
1
SO
2
WP#
3
VSS
4
SI
5
SCK
6
HOLD#
7
VDD
8
VDD3
R152 4.7K_04
C647
0.1u_16V_Y5V_04
SMC_CPU_THERM2,12
C177
0.1u_16V_Y 5V_04
RX
512Kbit
CCD_DET#30
VDD3
C649
0.1u_16V_Y 5V_04
VGA_FANSEN 30
C179 0.1u_16V_Y5V_04
C189
15p_50V_NPO_04
CPU_FAN30
D25
BAV99
A
C
AC
R473 *10_04
KBC_AVDD
C194 0.1u_16V_Y 5V_04
C211
0.1u_16V_Y5V_04
R164 10M_04
SWI# 13
KBC_SPI_SO_R
KBC_HOLD#
KBC_SPI_SCLK_R
SPI_VDD_1
.
L26
HCB1005KF-121T20
C207
*.1U_16V_04
KBC_FLASH
KBC_SPI_SI
KBC_SPI_SO
KBC_SPI_SCLK
KBC_SPI_CE#_R
KBC_SPI_SI_R
KBC_SPI_CE#
J_KBT1
85201-24051
24
23
22
14
12
11
21
8
20
19
6
5
18
4
17
10
9
7
3
2
1
16
15
13
R206 100_04
R151 4.7K_04
R171 *0_04
J_H8DBG1
SPUFZ-10S3-VB-0-B
12
34
56
78
910
R157 4.7K_04
R200 10K_04
BAT_VOLT
VDD3
VDD3
KBC_AGND
KBC_AGND
VDD3
DD_ON 34
SMI# 16
CHG_EN 40
PWR_BTN# 13
3G_EN 27
RSMRST# 13
CPU_FANSEN 30
BT_DET# 27,28
ALL_SYS_PWRGD 13, 21,24
WLAN_DET# 27
SUSB# 13,26,28,36,41
SUS_PWR_ACK 13
BAT_VOLT40
LPC_AD011,28
MXM_PRESNT#16,24
SMC_BAT40
LPC_FRAME#11,28
LPC_AD311,28
TP_C LK28
KBC_BEEP31
SMD_VGA_THERM24
AC_IN#13,40
WLAN_EN27
BKL_EN21
BT_EN27,28
80CLK27
3IN127
80DET#27
PCLK_KBC_R
80CLK
D02 Delete
C333,C334,C335,C337,C340,C341,C343,
C344,C330,C331,C332,C336,C338,C339,
C342,C345,C346,C347,C348,C349,C350,
C351,C352,C353
VDD3
80DET#
3IN1
CASE_FAN30
SMD_VGA_THERM
SMC_VGA_THERM
3G_DET# BAT_VOLT_R
CASE_FANSEN 30
LAN_PCIE_WAKE#
WLAN_EN
80DET#
BAT_VOLT_R
PCLK_KBC
BT_EN
LCD_BRIGHTNESS
3IN1
LED_ACIN#
MOD EL_ ID
SMD_BAT
80CLK
SMC_BAT
BAT_DET
CCD_DET#
C703
*0.1u_16V_X7R_04
D35
*BAV99
A
C
AC
3.3V
PM_EXTTS#_EC3
CCD_DET#
D02
J_80DEBUG1
88266-05001
1
2
3
4
5
KBC_SPI_CE#
LED_SCROLL#
X9 *MC-146_32.768KHZ
14
3 2
LED_NUM#
LED_CAP#
6-20-94A80-124
6-20-94A80-124
LED_BAT_FULL#
LED_BAT_CHG#
LED_PWR#
R137 *0_04
VGA_FAN30
D15 SCS751V-40
AC
CIR_IN
KBC_SPI_SI
AC/BATL# 24
KBC_SPI_SO
CK32KE
CK32K
NC2
*NC_04
NC3
*NC_04
KBC_SPI_SCLK
SMD_CPU_THERM2,12
VDD3 2,11,27,28,29,30,34,35,40
SMD_CPU_THERM
R525 *0_04
H_PECI3,16
MODEL_ID
D02 ADD
C678
D02 CHANGE
D02 CHANGE
D02 CHANGE
R489 0_04
D03 CHANGE
FOR W870CU
CIR_RX30
R148 10K_04-7
VDD3
CIR_IN
D16 SCS355V-7
AC
CIR_RX
FOR W870CU
SMC_CPU_THERM
SMC_BAT
SMD_BAT
3G_PWREN27
DD_ON_LATCH 34
DD_ON_LATCH
C678
0.1u_16V_Y5V_04
PM_CLKRUN# 13,28
KB-SI7
KB-SO13
KB-SO8
KB-SO5
KB-SO4
KB-SO6
KB-SO9
KB-SI3
CCD_EN
KB-SO12
KB-SO7
KB-SI4
KB-SO1
KB-SO11
KB-SO15
KB-SO2
KB-SI1
KB-SI2
KB-SI6
KB-SI0
EC_VSS
KB-SO14
KB-SI5
KB-SO0
KB-SO3
KB-SO10
J_KBT2
85201-24051-7
24
23
22
14
12
11
21
8
20
19
6
5
18
4
17
10
9
7
3
2
1
16
15
13
SATA_LED# 11
KBC_WRESET#
CCD_EN 30
Sheet 25 of 57
EC-IT8502E